There's one other element that goes against Del Rio (and all the defensive coaches). It wasn't just bad scheme, but it was the constant miscommunication and dropped coverages that never got fixed. That's a failure in coaching, scheming, and teaching. Look at what Masko did along the line. He was able to plug in a fourth string center and make him servicable. With spit and bubble gum, he held our line together for such a long time. Sure, it fell apart against Dallas, but at that point we were down to our back up tackles (was Leno and Cosmi both out? I can't remember), third string guard, and fourth string center.